Sym454 -9000 -8000 -7000 -6000 -5000 -4000 -3000 -2000 -1000 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1460 1470 1480 1490 1500 1510 1520 1530 1540 1550 1560 1570 1580 1590 1600 1610 1620 1630 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1680 1690 1700 1710 1720 1730 1740 1750 1760 1770 1780 1800 1900 2000 2025 2100 2200 2300 3000 January February March April May June July August September October November December -- 1 [Monday(0)] 2 [Tuesday(1)] 3 [Wednesday(2)] 4 [Thursday(3)] 5 [Friday(4)] 6 [Saturday(5)] 7 [Sunday(6)] 8 [Monday(0)] 9 [Tuesday(1)] 10 [Wednesday(2)] 11 [Thursday(3)] 12 [Friday(4)] 13 [Saturday(5)] 14 [Sunday(6)] 15 [Monday(0)] 16 [Tuesday(1)] 17 [Wednesday(2)] 18 [Thursday(3)] 19 [Friday(4)] 20 [Saturday(5)] 21 [Sunday(6)] 22 [Monday(0)] 23 [Tuesday(1)] 24 [Wednesday(2)] 25 [Thursday(3)] 26 [Friday(4)] 27 [Saturday(5)] 28 [Sunday(6)] -- is 1660-07-23